Veterans of the atheosphere might recognize Zoroastrianism as the ancient Persian religion whose Mithraic component is the best-attested antecedent for many Christian traditions, such as celebrating the birth of Jesus on 25 December. What I didn’t know is that Zoroastrianism is a living religion, with active fire temples singing the praises of the god Ahura Mazda and a world membership of over 200,000, a surprising fraction of which live in Canada. I can only imagine how they feel about freethinkers using their history as one of many disproofs of Christianity. My guess? Weirdly flattered.